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el. paštaskodas
Non-destructive testing
Contents
Introduction
1. Effect of Piezoelectricity, Types of Ultrasonic Transducers and Vibrational Modes
Aim of the work
Theoretical background
Piezoelectricity
Modes of sound wave propagation
Calibration methods
Acoustic impedance
Couplant
Effect of frequency on attenuation
Equipment
Description of the work
Content of the lab report
2. Investigation of Characteristics of Piezoelectric Transducers
Aim of the work
Theoretical background
Central frequency and bandwidth
Transfer function and amplitude frequency response
Impulse response
Equivalent circuit of the piezoelectric transducer
Electrical input and output impedances
Equipment
Description of the work
Content of the lab report
3. Measurement of the Fields of Ultrasonic Transducers
Aim of the work
Theoretical background
Acoustic field of an ultrasonic transducer
Directivity diagram
Hydrophone
Equipment
Description of the work
Content of the lab report
4. Measurement of Ultrasound Velocity and Attenuation. Investigation of Material Properties
Aim of the work
Theoretical background
Measurement of ultrasound velocity by using the contact pulse echo method
Measurement of ultrasound velocity by using a delay line
Shear wave velocity measurement methods
Uncertainty of ultrasound velocity measurement
Attenuation of an ultrasound wave and its measurement
Measurement methods of attenuation
Investigation of material properties
Young’s modulus
Poisson’s (longitudinal/transverse deformation ratio) coefficient
Shear modulus
Bulk modulus
Equipment
Description of the work
Content of the lab report
5. The Main Methods of Ultrasonic Measurement. Data Presentation
Aim of the work
Theoretical background
Contact pulse-echo method
Data presentation: A-scan, B-scan and C-scan
Angle beam method
Immersion method
Through transmission
Air-coupled method
Ultrasonic examination of various materials
Equipment
Description of the work
Content of the lab report
6. Investigation Using Transducer Arrays
Aim of the work
Theoretical Background
Equipment
Description of the work
Content of the lab report
7. Investigation of Samples by Using X-Ray Radiography
Aim of the work
Theoretical Bacground
X-ray computer tomograph RayScan 250E
Quality of the X-ray image
Equipment
Description of the work
Preparation of the RayScan 250E system
Taking Reference Frames
Setting up the measurement
Image preview and saving by using CT Reconstruction RayWare
Measurement 2
Measurement 3
Measurement 4
Measurement 5
Content of the lab report
8. Investigation of Samples by Using Eddy Current
Aim of the work
Theoretical Bacground
Principle of eddy current testing
Impedance plane display
Depth of penetration
Eddy current probes
Reference standards
Conductivity
Advantages and disadvantages of eddy current testing
Application areas
Equipment
Description of the work
Content of the lab report
Annexes
Annex 1
Ultrasonic measurement system Ultralab
4-axis stepping and servo motor control Card options
Annex 2
Ultrasonic and Eddy current flaw detector Omniscan MX
Annex 3
Ultrasonic Immersion measurement system Tecscan TS
Further Reading

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